CLI tool: future enhancements (v2+)

[GiggleLiu]

Future enhancements for pred CLI tool

Tracking items deferred from v1 (see docs/plans/2026-02-18-cli-tool-design.md).

Features

• k-neighbor exploration: Given a problem, list k-hop neighbors in the reduction graph for both outgoing (can reduce to) and incoming (can be reduced from) directions. e.g., pred graph neighbors MIS --hops 2 --direction both
• ILP solver integration: Add --solver ilp option to pred solve
• All paths: pred graph paths <Source> <Target> — list all reduction paths, not just cheapest
• Interactive REPL mode: pred interactive — persistent session for exploratory learning with state between commands
• Colored/table output: Pretty-printed tables, colored terminal output for better readability
• Shell completions: Generate completions for bash/zsh/fish via clap

Context

The v1 CLI (pred) provides graph exploration (list, show, path, export) and computation (solve, reduce, evaluate, schema) with plain text and JSON output.

[GiggleLiu]

Fixed by #84